diff --git a/README.md b/README.md
index c5dea05..1bfc718 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ better RAC client
 - plays sound when users receive your messages
 - coloring usernames by their clients (CRAB, clRAC, Mefidroniy, etc)
 - configurable message format 
-- RACv1.99.x compatible
+- RACv1.99.x and RACv2.0 compatible
 
 ![image](https://github.com/user-attachments/assets/a2858662-50f1-4554-949c-f55addf48fcc)
 
@@ -71,8 +71,9 @@ max_messages: 100                  # chat messages limit
 
 ## see also
 
-- [RAC protocol (v1.99.2)](https://gitea.bedohswe.eu.org/pixtaded/crab#rac-protocol)
+- [RAC protocol (v2.0)](https://gitea.bedohswe.eu.org/pixtaded/crab#rac-protocol)
 - [CRAB - client & server for RAC](https://gitea.bedohswe.eu.org/pixtaded/crab)
+- [Mefidroniy - client for RAC](https://github.com/OctoBanon-Main/mefedroniy-client)
 - [Colored usernames](https://github.com/MeexReay/bRAC/blob/main/docs/colored_usernames.md)
-- [AlmatyD - server for RAC](https://gitea.bedohswe.eu.org/bedohswe/almatyd)
+- [AlmatyD - server for RACv1.0](https://gitea.bedohswe.eu.org/bedohswe/almatyd)
 - [RAC protocol (v1.0)](https://bedohswe.eu.org/text/rac/protocol.md.html)
diff --git a/docs/rac_protocol.md b/docs/rac_protocol.md
deleted file mode 100644
index 4d94406..0000000
--- a/docs/rac_protocol.md
+++ /dev/null
@@ -1 +0,0 @@
-todo
\ No newline at end of file
diff --git a/src/chat.rs b/src/chat.rs
index 024658b..83e7e38 100644
--- a/src/chat.rs
+++ b/src/chat.rs
@@ -161,15 +161,15 @@ pub fn print_console(ctx: Arc<Context>, messages: Vec<String>, input: &str) -> R
 
 
 fn prepare_message(context: Arc<Context>, message: &str) -> String {
-    format!("{}{}{}",
+    format!("{}{}{}\r",
         if !context.disable_hiding_ip {
             "\r\x07"
         } else {
             ""
         },
         message,
-        if !context.disable_hiding_ip && message.chars().count() < 39 { 
-            " ".repeat(39-message.chars().count()) 
+        if !context.disable_hiding_ip && message.chars().count() < 53 { 
+            " ".repeat(53-message.chars().count()) 
         } else { 
             String::new()
         }
@@ -300,12 +300,12 @@ fn poll_events(ctx: Arc<Context>) -> Result<(), Box<dyn Error>> {
                             if message.starts_with("/") && !ctx.disable_commands {
                                 on_command(ctx.clone(), &message)?;
                             } else {
-                                if let Some(password) = &ctx.auth_password {
-                                    send_message_auth(&ctx.host, &ctx.name, password, &message)?;
+                                let message = prepare_message(ctx.clone(), &ctx.message_format
+                                    .replace("{name}", &ctx.name)
+                                    .replace("{text}", &message));
+                                if ctx.auth {
+                                    send_message_auth(&ctx.host, &message)?;
                                 } else {
-                                    let message = ctx.message_format
-                                        .replace("{name}", &ctx.name)
-                                        .replace("{text}", &message);
                                     send_message(&ctx.host, &message)?;
                                 }
                             }
diff --git a/src/config.rs b/src/config.rs
index a767860..457a05f 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -174,8 +174,8 @@ pub struct Args {
     pub configure: bool,
 
     /// Authentication password
-    #[arg(short='a', long, value_name="PASSWORD")]
-    pub auth: Option<String>,
+    #[arg(short='a', long)]
+    pub auth: bool,
 }
 
 pub struct Context {
@@ -191,7 +191,7 @@ pub struct Context {
     pub max_messages: usize,
     pub enable_ip_viewing: bool,
     pub scroll: Arc<AtomicUsize>,
-    pub auth_password: Option<String>,
+    pub auth: bool,
 }
 
 impl Context {
@@ -209,7 +209,7 @@ impl Context {
             max_messages: config.max_messages,
             enable_ip_viewing: args.enable_users_ip_viewing || config.enable_ip_viewing,
             scroll: Arc::new(AtomicUsize::new(0)),
-            auth_password: args.auth.clone()
+            auth: args.auth
         }
     }
 }
\ No newline at end of file
diff --git a/src/proto.rs b/src/proto.rs
index b314814..8bdd7c1 100644
--- a/src/proto.rs
+++ b/src/proto.rs
@@ -9,37 +9,31 @@ pub fn send_message(host: &str, message: &str) -> Result<(), Box<dyn Error>> {
     Ok(())
 }
 
-pub fn send_message_auth(host: &str, name: &str, password: &str, message: &str) -> Result<(), Box<dyn Error>> {
+pub fn send_message_auth(host: &str, message: &str) -> Result<(), Box<dyn Error>> {
+    register_user(host, message, message)?;
     let mut stream = TcpStream::connect(host)?;
     stream.write_all(&[0x02])?;
-    stream.write_all(name.as_bytes())?;
-    stream.write_all(&[b'\n'])?;
-    stream.write_all(password.as_bytes())?;
+    stream.write_all(message.as_bytes())?;
     stream.write_all(&[b'\n'])?;
     stream.write_all(message.as_bytes())?;
+    stream.write_all(b"\n\r   ")?;
     let mut buf = vec![0; 1];
-    stream.read_exact(&mut buf)?;
-    if buf[0] == 0x01 {
-        register_user(host, name, password)?;
-        send_message_auth(host, name, password, message)?
-    } else if buf[0] == 0x02 {
-        println!("Password is incorrect");
-        panic!()
+    if let Ok(_) = stream.read_exact(&mut buf) {
+        if buf[0] == 0x02 {
+            let message = format!("\x1f{message}");
+            register_user(host, &message, &message)?;
+            send_message_auth(host, &message)?;
+        }
     }
     Ok(())
 }
 
 pub fn register_user(host: &str, name: &str, password: &str) -> Result<(), Box<dyn Error>> {
     let mut stream = TcpStream::connect(host)?;
-    stream.write_all(&[0x00])?;
+    stream.write_all(&[0x03])?;
     stream.write_all(name.as_bytes())?;
     stream.write_all(&[b'\n'])?;
     stream.write_all(password.as_bytes())?;
-    // let mut buf = vec![0; 1];
-    // stream.read(&mut buf)?;
-    // if buf[0] == 0x01 {
-    //     // похуй
-    // }
     Ok(())
 }